175 lines
3.2 KiB
Plaintext
175 lines
3.2 KiB
Plaintext
' The png image can be generated by running:
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'
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' plantuml minor_update.plantuml
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@startuml
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actor User
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participant Mistral
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participant Heat
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participant Ansible
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participant Nodes
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' in newer versions of plantuml we should use: collections Nodes
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' === UPDATE PREPARE ===
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User -> Mistral : openstack overcloud\nupdate prepare
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activate Mistral
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Mistral -> Mistral : plan update
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Mistral -> Heat : stack update
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activate Heat
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Heat --> Mistral
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deactivate Heat
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Mistral --> User
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deactivate Mistral
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' === UPDATE RUN ===
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User -> Mistral : openstack overcloud\nupdate run
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activate Mistral
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note right of Heat
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* Operates on all selected nodes one-by-one.
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end note
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Mistral -> Heat : query stack outputs
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activate Heat
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Heat --> Mistral : stack outputs
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deactivate Heat
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Mistral -> Mistral : generate playbooks
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Mistral -> Ansible : update_steps_playbook.yaml
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activate Ansible
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Ansible -> Nodes : update_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible -> Nodes : host_prep_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible -> Nodes : common_deploy_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible -> Nodes : post_update_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible --> Mistral
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deactivate Ansible
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Mistral --> User :
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deactivate Mistral
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' === EXTERNAL UPDATE RUN ===
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User -> Mistral : openstack overcloud\nexternal-update run
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activate Mistral
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note right of Heat
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* Executes tasks on undercloud, but can affect
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overcloud via delegation or nested Ansible process.
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* Single play: facts are carried over between
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update and deploy tasks.
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* Often limited via `--tags` to perform a particular
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update task or an update of a particular service.
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* Can be executed before `update run` for some tasks.
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end note
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Mistral -> Heat : query stack outputs
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activate Heat
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Heat --> Mistral : stack outputs
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deactivate Heat
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Mistral -> Mistral : generate playbooks
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Mistral -> Ansible : external_update_steps_playbook.yaml
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activate Ansible
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Ansible -> Nodes : external_update_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible -> Nodes : external_deploy_tasks all steps
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible --> Mistral
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deactivate Ansible
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Mistral --> User :
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deactivate Mistral
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' === UPDATE CONVERGE ===
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User -> Mistral : openstack overcloud\nupdate converge
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activate Mistral
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note right of Heat
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* Essentially the same as `overcloud deploy`,
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asserts that the state of overcloud matches
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the latest templates.
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end note
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Mistral -> Mistral : plan update
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Mistral -> Heat : stack update
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activate Heat
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Heat --> Mistral
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deactivate Heat
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Mistral -> Heat : query stack outputs
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activate Heat
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Heat --> Mistral : stack outputs
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deactivate Heat
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Mistral -> Mistral : generate playbooks
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Mistral -> Ansible : deploy_steps_playbook.yaml
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activate Ansible
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Ansible -> Nodes : host_prep_tasks
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible -> Nodes : deploy_tasks and external_deploy_tasks\nall steps (interleaved)
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activate Nodes
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Nodes --> Ansible
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deactivate Nodes
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Ansible --> Mistral
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deactivate Ansible
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Mistral --> User :
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deactivate Mistral
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@enduml
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